This sounds kind of similar to an issue with -ati/-fglrx where leftover bits from the proprietary driver causes random corruption and hangs. There is a troubleshooting guide for this issue for fglrx: https://wiki.ubuntu.com/X/Troubleshooting/FglrxInteferesWithRadeonDriver - Mind seeing if it helps to purge away all nvidia bits and reinstall mesa and -nv?
** Changed in: xserver-xorg-video-nv (Ubuntu) Status: Confirmed => Incomplete -- [karmic] nv driver triggers seemingly random lockups on GeForce 7300 GT https://bugs.launchpad.net/bugs/412469 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs